Planograph co



LE GRAND PARISH.

LOCOMOTIVE FIRE BOX CONSTRUCTION. APPLICATION FILED MAY 15. 1914.

1,308 1 O2. 7 Patented July 1, 1919.

Wvbmeow THE COLUMBIA PLANOGRAPH 60.. WASHINGTON, n. c.

LE enAunrAnIsH, or new Yonx, N. Y.

nocoivrorrvn-rmn-sox, oonsrnucrron. J

Specification of Letters Patent. I

Application filed May 15, 1914.. Serial in. 838,655.

To all whom it may concern:

Be it known that I, Ln GRAND PARISH, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Locomotive-Fire-Box Construction, of which the following is a specification.

This invention relates to locomotive fireboxes and has reference particularly to an improved arrangement of circulatian means whereby the circulation tubes may be secured to the outer wall of the water spaces, thereby making it possible to more securely fasten the ends of the circulation tubes and prevent their pulling out. My invention also contemplates an improved arrangement of circulation tubes whereby the ends of the tubes are accessiblenotonly for purposes of repair and inspection but also to facilitate the work of expanding the ends of the tubes when first installed. i

In conjunction with the foregoing vention contemplates a novel means for establishing communication between the circulation tubes andthe water spaces, such means also being adapted to exclude scale or mud or other material from depositing in the circulation tubes.

The foregoing together with such other objects as may hereinafter appear, or are incident to my invention, I attain by means of a construction which I have illustrated in the accompanying drawings inpreferred form. Of the drawings Figure 1 is a 1ongitudinal section through a locomotive firebox showing the application of my improvements thereto; Fig. 2 is an enlarged section of the forward end of one of the circulation tubes and the member for connecting the circulation tubes with the boiler; and Fig. 3 is a section similar to Fig. 2 but illustrates a modification of my invention.

In order that a better understanding may be had of my invention, the general arrangement of the fire-box will first be described. The fire-box shown in the drawings is of standard construction, and comprises an inner fire-box composed of a tube sheet 1, side sheets 2, a back sheet 3, and a crown sheet 4,

and an outer fire-box composed of a throat sheet 1 outside side sheets, a back sheet 3', and a cover or top sheet 4*. The forward end of the inner fire-box is the flue sheet 13 into which the ends of the flue 12 are expanded. The crown sheet and the cover sheet are coni the tubes are first "Wll-l-Cll acc dents are llable to occur in service.

Patented July 1, 1919.

.nected by the radial stay-bolts 7 and the back sheets are connected by the stay-bolts 6.

In the standard types of fire-boxes, it has been customary to provide circulation tubes,

usually four in number, which extend rear- I wardly and upwardly from the tube sheet to the back sheet connecting the front and "rear water legs or spaces. The rear ends of the circulation tubes were expanded in the back sheet and the forward ends expanded in the sheet 1. The limited space between the sheetl and the sheet 1 makes it difficult for the workmen to properly fasten the ends of the circulation tubes, and it also interferes with inspection. It is therefore difficult to detect faulty workmanship when installed as a result of Because of faulty workmanship the tubes sheet 1 andthe outer sheet 1, and by doubly fastening the tubes. At the throat sheet a this arrangement the tubes are not only soalso frequently pull out of the sheet. Iv 1 overcome these difficulties by extending the v i l circulation tubes 8 through both the throat my 111'! curely fastened or beaded but safety,'in so far as workmanship is concerned, is obtamed because of the accesslbillty to the ends of the tubes. It will be apparent also that inspection is greatly simplified.

It will be obvious that communication be tween the forward ends of the tubes and the boiler may be obtained in a variety of ways, but I prefer to provide a detachable tube extension member 14 one end of which is provided with a flange 15 which surrounds the end of the circulation tube and is secured to the outer sheet, preferably by means of studs. The other end of the member 14 extends into the lower part of the boiler, projecting some little distance above the sheet. A flange 16 is provided which is also bolted to the sheet. The intake 17 of the member 14 is located at the side for the purpose of preventing the scale which falls from the flues from entering into the members 14 and the circulation tubes. The scale and mud in the bottom ofthe boiler, or at least the heavier particles thereof are effectually excluded. If desired, wash-out copies or this patent may he obtained. for

plugs 18 and 19 may be provided for cleaning out the members 14 and the circulation tubes.

In the construction just described the members 14 are made of cast metal, but because of the location of said members it may be desirable to substitute material of greater flexibility. WVith this in view I have provided the construction shown in Fig. 3 wherein the extension members 14 are made of wrought iron and are held in position by means of collars 20 and 21.

I claim 1. A locomotive firebox construction comprising in combination outside and inside sheets spaced apart to provide a steam space and. water legs, a circulation tube connecting front and rear water legs and having its forward end extending through both sheets of the front water leg, and a circulation extension member establishin communication with the boiler having a an'ge adapted to be secured to the outside sheet over the end of said tube and a flange for attachment to the boiler sheet.

A locomotive fire box construction comprising in combination outside and inside sheets spaced apart to provide a' steam space and water legs a circulation tu'be connecting front and rear water legs and having its forward end extending through both sheets of the front water leg, and a circulation extension member establishing communication with theboiler having a flange at one end adapted to be secured to the outside sheet over'the end of said tube and having its other end projecting into the boiler adjacent the front water leg and provided with means for attachment to the boiler sheet.

3. A locomotive fire box construction comprising in combination outside and inside sheets spaced apart to provide a steam space and water legs, a circulation tube connecting front and rear water legs and having its forward end extending through both sheets of the front water leg, and a rounded circulation extension member having means at one end for attachment to the outside sheet over the end of said tube and having means adjacent the other end for attachment to the boiler sheet.

4. A locomotive fire-box construction comprising in combination outside and inside sheets spaced apart to provide a steam space and water legs, and a continuous circulation tube directly connecting front and rear water legs and having its forward end extending through both sheets of the front water leg and secured to one of said sheets, and a circulation extension member establishing communication with the boiler adjacent said leg and secured to the outside sheet and surrounding the end of said tube.

In testimony whereof I have hereunto signed my name in the presence of two subscribed witnesses.

LE GRAND PARISH.

Witnesses PAUL SYNNESTVEDT, HARVEY L. Lnormnn.

{we cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

